Improved mode of preventing corrosion in fifes, bolts



llnitni gmini REUBEN LIGIITHALL, OF BROOKLYN NEW YORK.

Letters Patent No. 97,657, dated December 7, 1869.

IMPROVBD MODE OP PRBVBNTING- CGRROBION IN PIPES, BOLTS, AND SIMILAR ARTI' CLES OF IRON IN SEA-WATER.

The Sdhednle referred to ln these Lettera Patent and making pan of the lame.

To all whom i t may concern.-

llc it known that l, RELBEX LlrilITnALI.,0t`Brooli lyn, in the count) ot' Kings, and State of New York, have invented a new nud useful Improvement iu Protecting l'ipes, Bolts, and other like articles or bodies, 0F which the thllowiog is a full, clear, and exact dcseription, ret'erenee being had to the accende-toying drawing, forming part of this speeitication, and in which- 1`igures 1 and 2 represent sectional views ol a surface eomleuser, in part, with a pipe and holt or bolts protected in acordnueo with my improvement.

Similar letters ot' reference indicate corresponding parts.

My improvement relates to the protection, from excessive ur rapid corrosion, of' iron pipes, bolts, and other like articles exposed to water or dannpuess, and is more particularly designed to he applied to connections and iiistenings in or about ships, nud to surfacecondensers pertaining thereto, asin the ense of steamships and other vessels, and it. will sudore here to de. scribe my improvement iu connection therewith.

This application of the improvement is Selected ou account ot' the. well-kuown destruction, oi' sali'. und other matter contained in sea-water, which seit-going steamships und other vease-ls are exposed to, causing rapid oxidation of the various iron pipes, holts, Ste., such oxidation and destruction being augmented by a certain galvanic action that takes place.

This oxidation I prolmse to retard or reduce hy establishing, in connection with the iron pipes or holts, :l roliaie pile that will euuse tho gnlranie action, caused hy the water and different metals in contact, to be absorbed, in n. measure :n: least, by n metal or metals which nrc positive to the iron, using t'or the purpose mainly two metals, such, for instance, as zine and tin, though copper may he used in addition, but preferably zinc and tin, on account ot' their approx# mation to eachother and to iron inthe galrunie scale, thereby produc-ing only a gentle concentration ot' the gulvnnio action or current on them to the protection of the iron.

In this way I transfer, iu a measure, the. oxidation to the zine and tin, without however using these metals otherwise than at points which would on many accounts he ohjeetionuhle und iinpracticuhle.

In illustmtimi, A A, iu the accompanying drawing, represent; the walls of a suri'ace-eomlcuser, and ll, one ot' its iron pipes which it is desired to protect.I

Connected with said pipo, at or near either end, or int-ermediately of its length, as may he, is n. voltnic pile, consisting, for instance, (in connection with the iron,) of a zinc uut, C, and tin sleeve l), which muy he variously shaped, or arranged as shown.

In ense of a bolt, as at E, the same or like protection is a'orded to the iron hy employing zine and tih washers or nuts, a b, with or without a copper plate or washer, c.

What is here claimed, and desired to he secured hy Letters l'ntent, is-

The combination with or application to iron pipes, holts, and other like hodies, ot' plates, nuts, sleeres, oi washeis surroiunling,r them at intervals, and composed of diiiereut; nictnls .approximating ewch other and the. iron in con-odihility, substantially as and for the purpose or purposes heit-in set forth.

HEBBEN LIGHTIIALL.

Witnesses:

Fin-1n. llarses, limon' PALnu. 

